EXT_texture_norm16 extension

The EXT_texture_norm16 extension is part of the WebGL API and provides a set of new 16-bit signed normalized and unsigned normalized formats (fixed-point texture, renderbuffer and texture buffer).

When this extension is enabled:

The WebGLRenderingContext.texImage2D() and WebGLRenderingContext.texSubImage2D() methods accept new formats provided by this extension.
The 16-bit normalized fixed-point types ext.R16_EXT, ext.RG16_EXT and ext.RGBA16_EXT become available as color-renderable formats and renderbuffers and be created in these formats.

WebGL extensions are available using the WebGLRenderingContext.getExtension() method. For more information, see also Using Extensions in the WebGL tutorial.

Note: This extension is only available to WebGL 2 contexts.

Constants

ext.R16_EXT: Red 16-bit unsigned format. Color-renderable.
ext.RG16_EXT: RG 16-bit unsigned format. Color-renderable.
ext.RGB16_EXT: RGB 16-bit unsigned format.
ext.RGBA16_EXT: RGBA 16-bit unsigned format. Color-renderable.
ext.R16_SNORM_EXT: Red 16-bit signed normalized format.
ext.RG16_SNORM_EXT: RG 16-bit signed normalized format.
ext.RGB16_SNORM_EXT: RGB 16-bit signed normalized format.
ext.RGBA16_SNORM_EXT: RGBA 16-bit signed normalized format.

Examples

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Enabling the extension

let ext = gl.getExtension("EXT_texture_norm16");

Texture formats

The WebGLRenderingContext.texImage2D() method accepts new formats when EXT_texture_norm16 is enabled. Example calls:

// imageData = Uint16Array
gl.texImage2D(gl.TEXTURE_2D, 0, ext.R16_EXT, 1, 1, 0, gl.RED, gl.UNSIGNED_SHORT, imageData);
gl.texImage2D(gl.TEXTURE_2D, 0, ext.RG16_EXT, 1, 1, 0, gl.RG, gl.UNSIGNED_SHORT, imageData);
gl.texImage2D(gl.TEXTURE_2D, 0, ext.RGB16_EXT, 1, 1, 0, gl.RGB, gl.UNSIGNED_SHORT, imageData);
gl.texImage2D(gl.TEXTURE_2D, 0, ext.RGBA16_EXT, 1, 1, 0, gl.RGBA, gl.UNSIGNED_SHORT, imageData);

// imageData = Int16Array
gl.texImage2D(gl.TEXTURE_2D, 0, ext.R16_SNORM_EXT, 1, 1, 0, gl.RED, gl.SHORT, imageData);
gl.texImage2D(gl.TEXTURE_2D, 0, ext.RG16_SNORM_EXT, 1, 1, 0, gl.RG, gl.SHORT, imageData);
gl.texImage2D(gl.TEXTURE_2D, 0, ext.RGB16_SNORM_EXT, 1, 1, 0, gl.RGB, gl.SHORT, imageData);
gl.texImage2D(gl.TEXTURE_2D, 0, ext.RGBA16_SNORM_EXT, 1, 1, 0, gl.RGBA, gl.SHORT, imageData);

Renderbuffer formats

The WebGLRenderingContext.renderbufferStorage() method accepts ext.R16_EXT, ext.RG16_EXT and ext.RGBA16_EXT as internal formats to create renderbuffers in these formats. Example calls:

gl.renderbufferStorage(gl.RENDERBUFFER, ext.R16_EXT, 1, 1);
gl.renderbufferStorage(gl.RENDERBUFFER, ext.RG16_EXT, 1, 1);
gl.renderbufferStorage(gl.RENDERBUFFER, ext.RGBA16_EXT, 1, 1);

Specifications

WebGL EXT_texture_norm16 Extension Specification